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ROYAL C47 questions,need answers please.

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ROYAL C47 questions,need answers please.

Old 08-17-2015, 06:27 AM
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Turqui
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Default ROYAL C47 questions,need answers please.

I recently got an old ROYAL C47 kit, its ready for covering.
I have a few questions, i will like to know if anybody have installed the robart retracts made for the TOP FLITE DC-3 on the ROYAL C47? And if you have,do they fit good?
Im going to convert them from air sistem to servo retract sistem.
Question #2: the kit its missing the cowls, the engine covers, where can i get them?
The TOP FLITE DC-3 plastic cowls work on the ROYAL C47?
Thanks.
Old 08-17-2015, 04:49 PM
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mscic-RCU
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http://www.fiberglassspecialtiesinc....lkit.htm#ROYAL / MARUTAKA

for the cowls
Old 09-06-2015, 06:41 AM
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jaka
 
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Hi!
I have fiber glass cowls for the Marutaka DC-3.
When it comes to retracts I used the Swiss Gizendanner retracs (Electric) for my DC-3. Total weigh 3,6kg , powered by two OS FS.26 four strokes.
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Old 10-10-2015, 08:44 PM
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wish I had seen this sooner but better late then never.
I have a royal c47 new in box, I work as a machinist, now only if we could find a machinist who specializes in metal spinning then I could duplicate my cowls.
heres a free set of plans to build the royal dc-3/c47 http://www.<span style="font-size:sm...ID=3628</span>
Old 10-17-2015, 01:20 PM
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Hi!
I just on a wim bought a pair of electrical retracts from HobbyKing and what a nice set they were. Very good quality! Havenīt used them on any plane yet though. Use those and make your own landing gear from 3mm piano wire like I did. The Robart system is just to heavy and bulky for a small plane like he Marutaka DC-3!

Picture 2 shows how the 110cc tin can tank was placed in my DC-3 with throttle cable going through the tank. Throttle servo is a 7g micro servo.
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Last edited by jaka; 10-17-2015 at 01:31 PM.
Old 10-17-2015, 07:19 PM
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Hello jaka
I really like your tank assembly. I have this kit in a box and two OS/Graupner wankels to install. My engines are quite thirsty so I would need 300cc for each of them. I think I have to put a large main tank above wing and use small header tanks inside nacelles.
About Robart retracts: do you mean that those scale struts for DC-3 are heavy or system in general. I was planning to use only struts and operate them with a servo.
Old 10-17-2015, 11:39 PM
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Hi!
Sorry! But two OS .30 wankel engines will be way way to much power and weight with the large 300cc tanks (Thatīs 600gram just in fuel). My DC-3 weigh 3,6kg ready to fly! With two OS .30 wankels you will reach a weight of 4,5 or 5kg which is no good.
Go with two .26 four strokes or two .20-.25 OS FP or LA engines instead.
The Robart system is bulky/heavy in general.

Last edited by jaka; 10-17-2015 at 11:43 PM.
Old 10-18-2015, 05:12 AM
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Originally Posted by jaka View Post
Hi!
Sorry! But two OS .30 wankel engines will be way way to much power and weight with the large 300cc tanks (Thatīs 600gram just in fuel). My DC-3 weigh 3,6kg ready to fly! With two OS .30 wankels you will reach a weight of 4,5 or 5kg which is no good.
Go with two .26 four strokes or two .20-.25 OS FP or LA engines instead.
The Robart system is bulky/heavy in general.
I thought .30 wankels would be good choice if noise is not taken into account. According to label on kit package: engine size .25-.40, weight 3.8-5kg. You have build your plane nicely below the range, exellent.
The kit and engines have travelled together since early 80's so I really want to join them. I have time to think because previous project is still occupying my build table.
Old 10-18-2015, 09:00 AM
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Hi!
Use those OS .30 wankels for something else and not for a twin engine scale plane. They not reliable enough compared to those engines I mentioned and much to powerfull and Heavy.
Old 10-23-2015, 09:22 PM
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I-fly-any-and-all
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your wankels should be just fine in a royal dc-3, i went to school for mechanical engineering and design, and i plan to resurrect royal products.
there is a guy on rcuniverse who built a royal b-17 with 4 wankels, not sure if it ever got flying.

http://www.rcuniverse.com/forum/twin...al-b-17-a.html

http://www.rcuniverse.com/forum/twin...al-b-17-a.html

royal kit forum: http://www.rcuniverse.com/forum/rc-s...oyal-kits.html
Old 10-23-2015, 09:22 PM
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Jaka how much for 4 of those custom made props and a set of nacelles for the royal dc-3?

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